/*jquery.cookie start*/
 function cookie_jq(name, value, options) { 
    if (typeof value != 'undefined') { 
        options = options || {}; 
        if (value === null) { 
              value = ''; 
              options = $.extend({}, options); 
              options.expires = -1; 
        } 
        var expires = ''; 
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) { 
              var date; 
              if (typeof options.expires == 'number') { 
                  date = new Date(); 
                  date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));   //这里改时间，单位毫秒，默认为1天。
              } else { 
                  date = options.expires; 
              } 
              expires = '; expires=' + date.toUTCString(); 
        } 
        var path = options.path ? '; path=' + (options.path) : ''; 
        var domain = options.domain ? '; domain=' + (options.domain) : ''; 
        var secure = options.secure ? '; secure' : ''; 
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join(''); 
    } else { 
        var cookieValue = null; 
        if (document.cookie && document.cookie != '') { 
              var cookies = document.cookie.split(';'); 
              for (var i = 0; i < cookies.length; i++) { 
                  var cookie = jQuery.trim(cookies[i]); 
                  if (cookie.substring(0, name.length + 1) == (name + '=')) { 
                        cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); 
                        break; 
                  } 
              } 
        } 
        return cookieValue; 
    } 
}; 
/* jquery.cookie end */